Article
Energy & Fuels
G. Gomez-Pozuelo, P. Pizarro, J. A. Botas, D. P. Serrano
Summary: This study reports the use of silica materials produced from rice husk as DeCH(4) catalysts, with silica samples showing large surface area and amorphous nature exhibiting the highest catalytic activity and remarkable resistance against deactivation.
Article
Chemistry, Physical
Ahmed S. Al-Fatesh, Adel Abdelkader, Ahmed I. Osman, Mahmud S. Lanre, Anis H. Fakeeha, Mansour Alhoshan, Yousef M. Alanazi, Ahmed E. Awadallah, David W. Rooney
Summary: In this study, non-supported pure and mixed cobalt and iron oxide catalysts were synthesized using a simple, environmentally friendly preparation method in which water was the sole solvent. The results showed that the mixed oxide catalysts exhibit higher catalytic activity than the pure oxides, and the Fe: Co atomic ratio is the key factor in the catalytic activity of these mixed oxides. Among the catalysts tested, the 50Fe + 50Co catalyst showed the highest catalytic activity towards methane conversion, reaching about 52.6%.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Mumtaj Shah, Mohammed K. Al Mesfer, Mohd Danish
Summary: In this study, the performance of 10 wt.% Co-1 wt. % Rh/TiO2 catalysts with varying textural properties were investigated for the production of hydrogen and carbon nanotubes via methane decomposition. The results showed that the texture of the TiO2 support has a significant influence on the catalytic performance, and the optimal activity and stability can be achieved by controlling the calcination temperature and phase composition of TiO2. Furthermore, the phase composition of the catalyst also affects the formation of carbon nanotubes.
Article
Chemistry, Physical
Hanan A. Ahmed, Ahmed E. Awadallah, Ateyya A. Aboul-Enein, Sanaa M. Solyman, Noha A. K. Aboul-Gheit
Summary: The study developed and examined bimetallic Ni-Mo catalysts supported on CeO2 and CeO2-SiO2 for CH4 decomposition, revealing the influence of SiO2 on catalytic efficiency. Ni-Mo/CeO2 catalyst demonstrated exceptional decomposition behavior and durability, with high hydrogen yield.
Article
Engineering, Chemical
Hazzim F. Abbas, U. P. M. Ashik, Salam A. Mohammed, Wan Mohd Ashri Wan Daud
Summary: The study experimentally demonstrated the catalytic effect of the internal surface of reactors made from stainless steel (SS310) on hydrogen production via methane decomposition, and investigated the effects of methane decomposition temperature and volume-hourly-space velocity on hydrogen production. The results showed that the catalytic activity of the SS310 reactor's internal surface increased with higher methane decomposition temperature and lower VHSV.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Green & Sustainable Science & Technology
Jing Xia Qian, Da Bin Liu, Jean Marie Basset, Lu Zhou
Summary: In this study, iron-containing materials from natural, industrial raw materials, by-products or wastes were investigated as catalysts for methane decomposition. The Fe2O3 species on these materials were found to be gradually reduced by methane to active Fe-0 species, which led to the formation of carbon nano-materials. The optimized reaction conditions for the highest carbon/hydrogen yield were determined to be 900 degrees C and 3 L/g(cat).h.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Multidisciplinary
Florian Zand, Suzanne J. T. Hangx, Christopher J. Spiers, Peter J. van den Brink, James Burns, Matthew G. Boebinger, Jonathan D. Poplawsky, Matteo Monai, Bert M. Weckhuysen
Summary: Understanding and controlling the structure and composition of nanoparticles in supported metal catalysts are crucial for improving chemical processes. Atom probe tomography (APT) is a powerful tool for three-dimensional chemical imaging of materials with nanometer resolution. However, APT has not been used for mesoporous oxide-supported metal catalysts due to sample fracture. In this study, we developed a high-pressure resin impregnation strategy to overcome this issue and successfully applied APT to high-porous supported Pd-Ni catalyst materials active in CO2 hydrogenation. Our results demonstrate the capability of APT to quantitatively assess the size, composition, and metal distribution of nanoparticles in industrial catalysts.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Haneol Kim, Hakjoo Kim, Sungeun Kim, Sangnam Lee, Jongkyu Kim
Summary: This study investigated the decomposition of methane using solar thermal energy, achieving high conversion rates at lower temperatures through the use of specific catalysts and reactor designs.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Applied
Saba Kazemi, Seyed Mehdi Alavi, Mehran Rezaei
Summary: A new type of spinel powder was used as a support for nickel-based catalysts in the thermal decomposition of methane to produce COx-free hydrogen. Various techniques were used to analyze the physicochemical characteristics of the samples. The results showed that the FeAl2O4-supported nickel catalyst had the highest stability and efficiency.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Energy & Fuels
Chenhui Kou, Shengkun Jia, Yiqing Luo, Xigang Yuan
Summary: In this study, a dynamic Eulerian-Lagrangian framework combined with porous media model was developed to simulate the performance variations of a tubular methane decomposition reactor. Particle behaviors and two-way coupling between continuous phase and carbon particles were considered. The results showed that the reaction accelerated with the formation of carbon particles and deposits, and there were significant variations of the local particle size distribution across the reactor. The causes of carbon plug formation and its impact were discussed.
Article
Chemistry, Physical
Tom A. J. Welling, Suzan E. Schoemaker, Krijn P. de Jong, Petra E. de Jongh
Summary: Gas-cell transmission electron microscopy has enabled direct, nanoscale imaging of catalysts during reaction. We compared the growth rates of carbon nanofibers measured gravimetrically in a reactor and observed through electron microscopy, and found good agreement. This allowed for detailed insight into the contribution of individual catalyst nanoparticles in these heterogeneous catalysts to overall carbon growth. The methodology of nanoscale in situ observations paves the way for understanding macroscopic rates of catalyzed reactions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Electrochemistry
Karolina Sipa, Konrad Rudnicki, Neus Vila, Gregoire Herzog, Slawomira Skrzypek, Lukasz Poltorak, Alain Walcarius
Summary: This study focuses on the development of smart materials through simple modification techniques, utilizing layer-by-layer assembly over an electrode to create a platform with alternating amplification and sieving electrochemical properties. The designed platforms were tested with redox probes and applied to the electroanalytical screening of ascorbic acid and dopamine.
ELECTROCHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Eugenio Meloni, Marco Martino, Antonio Ricca, Vincenzo Palma
Summary: Hydrogen as a green energy source can be produced through methane steam reforming, but traditional methods have limitations in terms of efficiency and cost. Microwave heating could overcome these limitations by efficiently transferring heat to the catalyst, resulting in faster reactions and higher energy efficiency. Initial tests showed promising results, with the system reaching high temperatures and methane conversion rates close to thermodynamic equilibrium values. Future studies will focus on optimizing the microwave reactor to further increase energy efficiency and improve CH4 conversion rates for enhanced hydrogen production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Multidisciplinary Sciences
Supanida Saconsint, Nonthicha Sae-tang, Atthapon Srifa, Wanida Koo-Amornpattana, Suttichai Assabumrungrat, Choji Fukuhara, Sakhon Ratchahat
Summary: In this study, a suitable catalyst for the simultaneous production of hydrogen-rich syngas and multi-walled carbon nanotubes was investigated. The NiMo/MgO catalyst exhibited excellent catalytic performance, achieving high conversions of CH4 and CO2 as well as producing high-quality syngas. Additionally, the use of NiMo/MgO catalyst resulted in the formation of well-aligned and high-purity CNTs, while the use of trimetallic catalysts led to deactivation.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Hamid Pourdelan, Seyed Mehdi Alavi, Mehran Rezaei, Ehsan Akbari
Summary: NiO-MgO catalysts with different nickel loadings were synthesized and characterized. The 50wt.%NiO-MgO catalyst exhibited the best activity in the methane decomposition process. The addition of Cr2O3 improved the catalytic performance and lifetime of the catalyst.
Review
Biochemical Research Methods
Daniela Iannazzo, Consuelo Celesti, Claudia Espro
Summary: Graphene quantum dots (GQDs) have attracted great interest for their exceptional properties and potential applications in cancer diagnosis and treatment. Factors such as size, surface functionalization, and biocompatibility play crucial roles in determining the effectiveness of GQDs in biological systems. Toxicity issues remain a challenge for the clinical development of GQDs-based therapeutic agents, and further research is needed to address this.
BIOTECHNOLOGY JOURNAL
(2021)
Article
Chemistry, Physical
Francesco Arena, Roberto Di Chio, Alessandra Palella, Lorenzo Spadaro, Leone Frusteri, Barbara Fazio, Sara Morandi, Gianmario Martra
Summary: The study demonstrates that ceria-promoted MnOx catalysts exhibit high activity in CO oxidation and phenol wet air oxidation reactions. The high oxide dispersion promotes the formation of solid-solution structures between Mn and Ce, enhancing the oxidation activity.
APPLIED CATALYSIS A-GENERAL
(2021)
Review
Chemistry, Physical
Antonella Satira, Claudia Espro, Emilia Paone, Paolo Salvatore Calabro, Mario Pagliaro, Rosaria Ciriminna, Francesco Mauriello
Summary: Limonene, a renewable cyclic monoterpene obtained from citrus peel, has various applications such as nutraceuticals, antibacterials, and biopesticides, and serves as a starting substrate for building block chemicals. Despite its potential, achieving selective production of p-cymene through dehydrogenation remains a scientific and technological challenge.
Article
Chemistry, Multidisciplinary
Claudia Espro, Daily Rodriguez-Padron
Summary: The increasing advances in mechanochemistry have led to new possibilities for developing organic processes in a more sustainable manner. Recent progress in this area, ranging from laboratory scale protocols to industrial applications, has been described. Innovations in mechanochemical procedures and in-situ characterization analyses have also been discussed, with technologies such as twin-screw extrusion and high-throughput reaction platforms being investigated for scale-up applications. Mechanochemistry is a highly promising approach with numerous potentialities yet to be uncovered.
CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY
(2021)
Article
Chemistry, Physical
Francesco Arena, Francesco Ferrante, Roberto Di Chio, Giuseppe Bonura, Francesco Frusteri, Leone Frusteri, Antonio Prestianni, Sara Morandi, Gianmario Martra, Dario Duca
Summary: The study revealed that Mn(IV) sites facilitate the conversion of CO to CO2, with MnCeOx catalysts having a high exposure of Mn(IV) sites showing exceptional CO oxidation performance. However, the oxidation activity of H-2 is limited. Empirical findings suggest that MnO2 materials have the potential to be efficient and robust PROX catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Applied
Alessandra Palella, Lorenzo Spadaro, Roberto Di Chio, Francesco Arena
Summary: The study investigated a series of MnCeOx composite materials for methane oxidation reaction, finding that increasing the proportion of CeO2 in the catalyst can significantly enhance the activity. The most active catalyst with a Mn-to-Ce ratio of 1:3 achieved almost complete methane conversion at 600 degrees Celsius.
Article
Chemistry, Physical
A. Ferlazzo, C. Espro, D. Iannazzo, K. Moulaee, G. Neri
Summary: This study investigates the development of a high-performance conductometric hydrogen sensor using pure and 8% Y2O3-doped zirconium oxide commercial samples. The sensor based on tetragonal ZrO2-Y2O3 (8%) exhibits the best performances in terms of sensor response, response and recovery time, and operating temperature.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Biochemistry & Molecular Biology
Miguel Angel Torres-Pastor, Claudia Espro, Maurizio Selva, Alvise Perosa, Antonio A. Romero Reyes, Sameh M. Osman, Rafael Luque, Daily Rodriguez-Padron
Summary: The intermolecular condensation of glycerol and aminophenol has been investigated using a milling and microwave-assisted sequential strategy to synthesize a benzoxazinone derivative. Mechanochemical activation prior to the microwave-assisted process enhances the contact between the reagents, improving the conversion of aminophenol. Additionally, the sequential approach allows for tuning the selectivity towards the formation of a benzoxazine derivative with potential applications in various biomedical areas.
Article
Chemistry, Analytical
Viviana Bressi, Zahra Akbari, Morteza Montazerozohori, Angelo Ferlazzo, Daniela Iannazzo, Claudia Espro, Giovanni Neri
Summary: A novel bidentate Schiff base (L) was proposed for the detection of Zn ions in water. The synthesized Schiff base L was characterized and found to exhibit fluorescence quenching in the presence of Zn2+ ion. A modified L-M/SPCE sensor with high sensitivity and selectivity to Zn ions was developed for electroanalytical determination in water.
Article
Chemistry, Multidisciplinary
Daniela Iannazzo, Claudia Espro, Angelo Ferlazzo, Consuelo Celesti, Caterina Branca, Giovanni Neri
Summary: This study investigated the potential of composites based on graphene quantum dots and crown ethers for detecting the concentration of sodium and potassium ions in biological fluids. The results demonstrated the superior properties of these composites, showing promise for the development of selective detection methods.
Article
Chemistry, Multidisciplinary
Antonella Satira, Emilia Paone, Viviana Bressi, Daniela Iannazzo, Federica Marra, Paolo Salvatore Calabro, Francesco Mauriello, Claudia Espro
Summary: Hydrothermal carbonization process can efficiently produce value-added chemicals and carbon-based materials simultaneously, and using orange peel waste can obtain hydrochar and high-added value products.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Physical
Consuelo Celesti, Teresa Gervasi, Nicola Cicero, Salvatore Vincenzo Giofre, Claudia Espro, Elpida Piperopoulos, Bartolo Gabriele, Raffaella Mancuso, Giovanna Lo Vecchio, Daniela Iannazzo
Summary: This study investigated the possibility of enhancing the antibacterial properties of titanium implants by covalently inserting bioactive ammonium salts onto the surface of titanium substrates. The chemically modified samples showed good resistance against bacterial adhesion, particularly when containing long alkyl chains. The results underscored the importance of chemical functionalization in improving the antimicrobial activity of metal surfaces.
Article
Chemistry, Multidisciplinary
M. Ronda-Leal, C. Espro, N. Lazaro, M. Selva, A. Perosa, S. M. Osman, A. Pineda, R. Luque, D. Rodriguez-Padron
Summary: Highly active, selective, and stable titania-based catalytic materials were synthesized using a simple and environmentally friendly microwave-assisted approach. The materials were further modified with metal nanoparticles using a simple chemical reduction method. The synthesized materials exhibited excellent catalytic performance in the reductive amination of furfural towards furfuryl amine, and showed remarkable recyclability after six reaction cycles.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Physical
Consuelo Celesti, Daniela Iannazzo, Claudia Espro, Annamaria Visco, Laura Legnani, Lucia Veltri, Giuseppa Visalli, Angela Di Pietro, Paola Bottino, Maria Assunta Chiacchio
Summary: Hybrid hydrogels composed of chitosan (CS) have great potential in bone tissue engineering and regeneration. The addition of polyhedral oligomeric silsesquioxanes (POSS) has been shown to improve the properties of the hybrid composites. In this study, we investigated the effect of different concentrations of POSS on the properties of the final composites and found that the CS/POSS hydrogels have good biocompatibility and controlled drug release ability.
Article
Engineering, Electrical & Electronic
Roberto Di Chio, Francesco Arena, Salvatore Gianluca Leonardi, Kaveh Moulaee, Giovanni Neri, Nicola Donato
Summary: This article reports the electrochemical monitoring of phenol in water using a nanostructured MnO2-modified screen-printed carbon electrode, showcasing the great potential of nanostructured MnO2 in developing high performance electrochemical sensors. The sensor demonstrated good characteristics and showed selectivity against inorganic analytes and other phenolic compounds.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
